Fihe-alaejyt



E. EHLIN. FIRE ALARM.

No. 30,624. Patented Nov. 13, 1860.

fizaewfar UNITED STATES PATENT OFFICE.

E. EHLIN, OF BOSTON, MASSACHUSETTS.

FIRE-ALARM.

Specification of Letters Patent No. 30,624, dated November 13, 1860.

T 0 all whom it may concern:

Be it known that I, E. EHLIN, of Boston, in the county of Suffolk andState of Massachusetts, have invented a new and Improved Fire-Alarm; andI do hereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the annexed drawingsmaking a part of this specification, in which Figure l, is a sidesectional view of my invention. Fig. 2, is a section of a door showingthe application of the invention to a burglar alarm.

Similar letters of reference indicate corresponding parts in the twofigures.

This invention consists in the employment or use of a fuse connectedwith an alarm substantially as hereinafter described, whereby the fusein case of a building taking fire will conduct the flame to a thread orfuse which holds a weight connected with the alarm mechanism andigniting the weight-sustaining thread or fuse, will cause the weight tobe liberated, the alarm mechanism to be actuated and the alarm sounded.

To enable those skilled in the art to fully understand and construct myinvention I will proceed to describe it.

A, represents a box in which an alarm mechanism is placed, said alarmbeing composed of a ratchet or escape wheel B, pallets a, a, with crutch6, attached to the crutch serving as the tongue of a bell O, the escapewheel being actuated by gearing 0, connected with a coil spring (Z.These parts are precisely similar to that comprising the alarm mechanismof an ordinary clock.

In' the lower part of the box A, just below the bell C, there is placeda frame I), which is pivoted at 6. One end of this frame is directlyunderneath the hammer f of the bell which hammer is attached to crutchb, and the opposite end is connected by a rod 9, to a cross bar h, underwhich one or more hooks catch. One of these hooks 2', is connected atits upper end by a rod j, to a bent lever 76, the opposite end of whichis connected by a rod Z, to a lever E, which has a weight F, at itsouter end. The lever E, is connected with a cock in a pipe or tube on,which forms a connection between a water pipe Gr, and a perforated pipeH.

Against the back end of the frame D,

there bears a spring I, and this spring has a tendency to keep the backpart of the frame against the hammer f, thereby preventing the movementof the same. This will be fully understood by referring to Fig. l.

The weight F, when the alarm is not in operation rests on a hinged 0rpivoted rod J, the outer end of which is sustained by a thread or fuse aconnected with lever E, and

to the outer end of the weight sustaining rod J, there is attached afuse K, which may have any number of branch fuses connected to it sothat they may extend through a building and be within every apartment.

From the above description it will be seen that in case of a buildingtaking fire the fuse K, will on being ignited conduct the flame directto the thread or fuse n, and the latter, on being burned liberates theweight F, which descends by its gravity to the position shown in red inFig. 1, and actuates the lever E, the latter opening the cock in thetube m, and allowing the water to descend from pipe G, intoH and at thesame time actuating the bent lever is, and causing the hook z to beelevated and the back or inner end of the frame D to be depressedthereby liberating the hammer f, and causing the alarm to be sounded.

The spring d, of the alarm is wound up by a key in the usual way. Theinvention may have a burglar-detecting attachment applied to it bysimply employing one or more extra hooks z and connecting them with awindow or door L, by means of rods 0, p, g, bent levers 1", and leverss, the latter being so arranged as to be actuated by a window or door onbeing opened. This lat.- ter arrangement however is similar to manyother plans devised for the same end.

I would remark that perforated pipes H may be placed in difiere-nt partsof a building and arranged in every compartment if desired, the watersupply pipe G, of course extending through the building and having pipesI-I, connected with it at the desired points.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is 1. The employment or use of a fuse K inconnection with a weight-sustaining combustible thread or fuse n appliedto a lever With a cock which is connected to the lever and Weight E, F,connected With an alarm E, to operate as and for the purpose set 10 tooperate substantially as and for the purforth.

pose set forth. c

5 2. In connection with the fuse K, applied EHLIN' as herein shown anddescribed, the perfo- Witnesses: rated pipe H, one or more, andWater-supply HORACE G. HUTGHIN,

pipe G, connected by a tube m, provided JOSEPH A. CUTTER.

